barit1
I believe the 4360 crank was in four pieces - one for each cylinder row. This would be necessary because the engine is assembled in a stack: the crankcase (with its 5 bearings) is in five segments, front to rear, with the crankshaft spline joints at the bearing journals #2, #3, and #4.
Thus the crankshaft throws could be manufactured in any required angular relationship.
How many other multi-row (twin, three, four, etc) radials were assembled as a stack?